This mod marks drills that have no more resources to mine for deconstruction.
This mod does not seem to mark drills for deconstruction when on uranium and the ore runs out. I'm guessing it has something to do with the sulfuric acid still in the drill.
It's in order to not cut off the remaining drills that are getting sulfuric acid through the finished drill. I might eventually make it smarter in this regard.
I was thinking that there could be checkbox in mod settings. Because most usualy, who cares about acid?
The remaining drills still need acid in order to run.